M1: 59.8°C, M2: 54.5°C, HS1: 61.2°C (The "Barcode" is a fault from my camera or memory card, this is the only time I have seen it).

M1: 53.9°C, HS1: 55.9°C
HS1 is one of the mains switchers.

M1: 45.6°C, HS1: 57.0°C
Again HS1 is one of the mains switchers.

M1: 55.3°C, HS1: 60.2°C

Noise at 0.5A load is: 15mV rms and 126mVpp.

Noise at 1A load is: 14mV rms and 244mVpp.

Noise at 2.5A load is: 12mV rms and 152mVpp.

Noise at 5A load is: 14mV rms and 163mVpp.

Noise at 0.5A QC load is: 4mV rms and 99mVpp.

Noise at 2.5A QC load is: 10mV rms and 205mVpp.

Noise at 12V 1.2A QC load is: 5mV rms and 118mVpp, all values are very low.

Tear down

Some pressure with my vice and I could break the lid of with a screwdriver. The circuit board did not come loose, it is secured with a bit of glue.

A bit more breaking and it was out, notice the white pads on the lid, they are to improve heat transfer.

The transformers is very close to the top heatsink.

And there is some heat transfer paste between transformer and heatsink.

The heatsink is covered in yellow tape for isolation and a gray heat transfer pad.

At the mains input is a fuse (F1) and two common mode coils (L1, ?) followed by a bridge rectifier (BD1). There are two mains switcher transistors on for 5V 2.4A and one for 2xQC (Q2). Between the two transformers are two safety capacitors and one opto-coupler for QC.
One the low volt side are two rectifier transistors (Q14 & Q15, synchronous rectification). The QC outputs shares a common mode coil and there is a inductor for each, they are mounted on two small circuit boards with the a QC controller each. There is also a small circuit board with 3 leds for the indicator on the front.

With two transformers there must also be two switch mode controllers (U1 & U2). The opto-coupler for 5V is on this side (U3). For the 5V 2.4 outputs there is a synchronous rectifier controller (U4), a OpAmp (U7) together with a resistor (R69: 0.007ohm) to add the cable compensation to the reference (U8 and/or U10). Each of the 3 2.4A usb output has a auto coding chip (U11, U12, U13: probably CW3002).
The QC contains a 14.1V power supply that has a synchronous rectifier controller (U5) and a voltage reference (U9).
The actual QC controllers are on other circuit board that are soldered in slots with 6 connections on each side.

The square chip (U15: marked AGQH569) is probably the buck converter.

The QC controller is here (U20: Marked PJK789)

There is more than enough distance between mains and low volt side.

Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.

Conclusion

This is a good charger with lots of output current (I can fast charge 4 devices at a time), it has auto coding, low noise and two Quick Charge outputs.